“Strain” is the most common misused word in the world of cannabis. The correct (non-marketing) agricultural word which should be used is “Chemovar”. A Chemovars (chemotype) are a chemically distinct entity in a plants, with differences in the composition of the secondary metabolites. Minor genetic and epigenetic changes may produce large changes in the chemical phenotype.
Drug varieties of Cannabis are commonly distinguished through the use of popular names (Strains), with a major distinction being made between Indica and Sativa types. Cannabinoids present in high concentrations in Cannabis flowers, are the main components for medical cannabis.
Also See: Cultivar; Strain